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Second difference predictive encoding method, and file positioning method

A secondary difference and predictive coding technology, which is applied in the field of streaming transmission, can solve the problems of low efficiency of streaming media file formats, achieve the effect of reducing code rate, reducing data volume, and improving usage efficiency

Inactive Publication Date: 2013-04-17
SUZHOUSNGJIA INFORMATION TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the traditional streaming media file format is inefficient in a network environment with limited bandwidth

Method used

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  • Second difference predictive encoding method, and file positioning method
  • Second difference predictive encoding method, and file positioning method

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The streaming media file format defined by the present invention can contain any streaming media data or non-streaming media data (such as text data), and it is suitable for streaming and can be read randomly. It can support various broadcast forms such as on-demand, broadcast, and live broadcast, and can also be transmitted through TCP or HTTP protocols.

[0026] The streaming media file format defined by the present invention comprises file header, index table, data load and file tail four parts, can also comprise media description information, and its structure is as shown in the table below:

[0027]

[0028] 1) The file header contains the logo and version information of this file format:

[0029] The flag of the file format: "MIIN", 4 bytes.

[0...

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Abstract

The invention discloses a second order difference predictive encoding method, which comprises the following steps of: A) performing second order operation on a parameter value with a continuously relative property of multimedia streams; and B) attaching a second order operation result serving as a new parameter value of the property to a data packet of the multimedia streams. The invention also discloses a streaming media file format applying the second order difference predictive encoding method and a method for positioning a streaming media file. By adopting the second order difference predictive encoding method provided by the invention, the data volume of each path of multimedia streams (mainly refer to audio streams and video streams) is greatly lowered and the using efficiency of a limited bandwidth is greatly improved. The second order difference predictive encoding method is very suitable for transmitting multimedia streams on a small-bandwidth network.

Description

technical field [0001] The invention belongs to the technical field of stream transmission, and in particular relates to a secondary differential predictive coding method, a file format and a file positioning method. Background technique [0002] Streaming Media Technology (Streaming Media Technology) is a network technology developed to solve the transmission problem of multimedia information (focusing on video and audio information) on medium and low bandwidth networks represented by the Internet. The most critical technology for the realization of streaming media is the streaming transmission technology which is different from the traditional download technology. There are two ways to implement streaming: real-time streaming (Realtime Streaming) and sequential streaming (Progressive Streaming). The former is a streaming media application based on RTSP / RTP protocol, and the latter has a streaming media application based on 3GP streaming mode. [0003] The RTSP / RTP protoc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/32H04L29/06H04N21/236H04N21/8547
Inventor 张立军李卿
Owner SUZHOUSNGJIA INFORMATION TECH
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